1188138041 has 8 divisors (see below), whose sum is σ = 1269572040. Its totient is φ = 1107986688.

The previous prime is 1188138037. The next prime is 1188138073. The reversal of 1188138041 is 1408318811.

It can be written as a sum of positive squares in 4 ways, for example, as 449440000 + 738698041 = 21200^2 + 27179^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1188138041 - 2² = 1188138037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1188137992 and 1188138010.

It is not an unprimeable number, because it can be changed into a prime (1188138011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318746 + ... + 322451.

It is an arithmetic number, because the mean of its divisors is an integer number (158696505).

Almost surely, 2^1188138041 is an apocalyptic number.

It is an amenable number.

1188138041 is a deficient number, since it is larger than the sum of its proper divisors (81433999).

1188138041 is a wasteful number, since it uses less digits than its factorization.

1188138041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641323.

The product of its (nonzero) digits is 6144, while the sum is 35.

The square root of 1188138041 is about 34469.3783088700. The cubic root of 1188138041 is about 1059.1455202898.

The spelling of 1188138041 in words is "one billion, one hundred eighty-eight million, one hundred thirty-eight thousand, forty-one".